Mattermost 4+

Mattermost, Inc.

    • 4.6 • 266 Ratings
    • Free



Requires Mattermost Server v9.5.0+. Older servers may not be able to connect or have unexpected behavior.


Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.

- Keep all of your team communications in one place.
- Orchestrate work across your tools and teams.
- Plan projects and hit milestones.
- Unite your entire technology stack through a single point of collaboration.
- Meet the strictest security, privacy, and compliance requirements.

To use this app, you need a URL for a Mattermost server.


Deploy your own server:

Terms of Service:

Contribute to the project:

What’s New

Version v2.17.0

iPhone 5s devices and later with iOS 13.4+ is required. Server version v9.5.0 or later is required.

- The iPhone Deployment Target was updated to 13.4. Old devices may not be able to update the app.
- Calls: Added a Participants list to the call screen.
- Calls: Added the host controls menu, allowing the current host (or admin) to transfer host duties to another.
- Calls: Added remove participant & view profile commands.
- Calls: Mute all option was added to participants list.
- Calls: added stop screenshare, mute, and lower hand functionalities.
- Changed the prioritized user autocomplete results based on recency and thread activity.
- Updated the default themes to reduce eye strain (particularly on the dark themes).
- Improved status management to avoid missing notifications.
- Fixed an issue where channels from other servers could get read on startup.
- Fixed an issue where a proxy link was copied instead of the original image link when copying a post that included an embedded image.
- Fixed erratic behaviour when pulling up to refresh a thread.
- Fixed an issue with the gallery footer showing an old profile picture.
- Fixed server option text in the Quartz theme.
- Fixed an issue on iOS where the badge number was not correct sometimes.

Ratings and Reviews

4.6 out of 5
266 Ratings

266 Ratings

vanitarium ,

Does not connect to server

Safari connects app doesn’t.. sad

Rally B. ,

Good service, buggy app

The Mattermost server itself is great, but this iOS app is buggy, buggy, buggy, buggy. I’ve missed messages because the chat view didn’t scroll down to show me them. I’ve had notifications not arrive. I’ve had messages suddenly vanish after they fail to be sent in a low-signal area. Sometimes I open the app and it immediately crashes. If you are using Mattermost already, you’ll probably be fine, but don’t choose the service based on how good the app is.

Nermie army:) ,

Good but buggy atm

The updates are nice but it seems to have brought issues to members of our team using the iOS app, many of us keep getting logged out repeatedly with ‘session expired’ but this has never happened in the past and means we have to keep logging back into the server

Developer Response ,

Hi there, the session lengths is a setting configured by system administrators, and can be extended if desired. We also recommend system admins to enable "Automatically extending sessions" to keep active users logged in. See more details at

App Privacy

The developer, Mattermost, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary based on, for example, the features you use or your age. Learn More

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